Undercoating???
- Thread starter 95ShoOff
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Are you doing it for rustproofing or looks?
Living in Ontario's snowbelt where tons of road salt are spread every Winter, you want to protect the inside of your frame, rocker panels and other components. Rubberized coatings protect the exterior but then your car starts disintegrating from the inside out. Oil spray, when applied properly inside all these parts, will provide adequate rust protection.
Had a Toyota Sienna sprayed with hard-rubberized coating. This coating eventually cracked and again, rust formed inside the rocker panels.
Same with a Mazda 6. Looked awesome and clean from underneath but subframe and rocker panels rusted.
On new vehicles I'd do both, rubberized on new (uncorroded) metal and then the oil. On used ones, yearly oil spray.
If there is no road salt where you live then a flexible rubberized coating should suffice.
Living in Ontario's snowbelt where tons of road salt are spread every Winter, you want to protect the inside of your frame, rocker panels and other components. Rubberized coatings protect the exterior but then your car starts disintegrating from the inside out. Oil spray, when applied properly inside all these parts, will provide adequate rust protection.
Had a Toyota Sienna sprayed with hard-rubberized coating. This coating eventually cracked and again, rust formed inside the rocker panels.
Same with a Mazda 6. Looked awesome and clean from underneath but subframe and rocker panels rusted.
On new vehicles I'd do both, rubberized on new (uncorroded) metal and then the oil. On used ones, yearly oil spray.
If there is no road salt where you live then a flexible rubberized coating should suffice.
Keep in mind that if your vehicle already has surface rust, it will continue rusting under a rubberized coating so just yearly oil applications might be better.
Here, there is a company called Krown, the oil they use is the same color of regular motor oil.
When I bought my SHO I scraped and brushed as much surface rust as I could from the underbody, then applied rust converter and then rubberized paint. After two years, surface rust was back so I started using the yearly oil spray.
Honestly, not sure the rust converter and coating are helping. I'm sticking to the oil for now.
I think coatings work if applied on new metal, my opinion.
These rear lower control arms look like crap today.
Here, there is a company called Krown, the oil they use is the same color of regular motor oil.
When I bought my SHO I scraped and brushed as much surface rust as I could from the underbody, then applied rust converter and then rubberized paint. After two years, surface rust was back so I started using the yearly oil spray.
Honestly, not sure the rust converter and coating are helping. I'm sticking to the oil for now.
I think coatings work if applied on new metal, my opinion.
These rear lower control arms look like crap today.
Last edited:
Currently I'm rust free, very little to barely any surface rust on maybe a total of 1 sqft.
Ta2dResqr
SHO Member
We use the oil spray yearly on our fleet at work. Short of stripping everything and putting POR-15 on it, I think oil is the best option. Undercoating also makes it a pain to work on in the future. Especially bedliner.
RickyRecon
SHO Member
I just saw that last time I ordered fluids. I already sprayed that surface shield pb blaster came out with recently or I would have gotten it. Might give it a shot next year, as I live about 45 mins away from Chicago. Same lake, same winter, all the salt.
SHOMON
95 MTX
nhoilundercoating.com
These guys sell all of the stuff to DIY the car including special cleaners.
These guys sell all of the stuff to DIY the car including special cleaners.
luigisho
SHO Member
I haven't heard or seen a Ziebart in forever. I remember those when i was a kid back in horse and buggy days
autoteleology
Member
Do not put rubberized undercoating on your car under any circumstances. Even straight off of the dealer lot brand new, it will destroy your car.
Instead, use a cosmoline-like, wax-type undercoating and/or rust-resistant paints.
Instead, use a cosmoline-like, wax-type undercoating and/or rust-resistant paints.
I like WoolWax better than fluid film. It doesn’t smell like rotten apples and I think it sticks a lot better. It’s still stuck on about a year later on my truck. Fluid film however, I think it penetrates and lubricates better than WoolWax but “runs off” a lot faster. Either way a good thorough spray job should do the trick, every year before snowfall.
Similar threads
